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J. M. CAMPBELL. SPACER. APPLIUATION FILED AUG.13,1908.

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Patented July 6, 1909.

, John .Camrbcu J. M. CAMPBELL.

SPACER- I APPLICATION FILED AUG.13, 1908, 927,110.

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JohnMCam M] UNITED STATES PATENT OFFICE.

JOHN M. CAMPBELL, OF NEW CASTLE, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TOWILLIAM G. CAMPBELL, OF NEW CASTLE, PENNSYLVANIA.

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To all whom it may concern:

Be it known that 1, JOHN M. CAMPBELL, a citizen of the United States,residing at New Castle, in. the county of Lawrence and State ofPennsylvania, have invented certain new and useful Improvements inSpacers, of which the following is a specification.

This invention relates to marking instruments, and more particularly tospacing instruments for marking siding etc., and has for its object toprovide an instrument of this kind WlllOl'l may be adjusted to mark aplurality of points equidistant from each other, and which will beadjustable to vary the distance between the points marked.

Another object is to provide an instrument of this kind which will besimple and which may yet be adjustable to suit dillerent condi tions.

A further object is to provide a structure such that two or more of theinstruments may be connected to produce a single longer instrument.

Another object is to provide a structure in which certain. of themarking parts may be moved out of operative position when desired.

Other objects and advantages will be apparent from the followingdescription and it will be understood that changes in the specificstructure shown and described may be made within the scope of the claimwithout departing from the spirit of the invention.

In the drawings forming a portion of this specification and in whichlike numerals of reference indicate similar parts in the several views,Figure 1 is a side elevation of the instrument, Fig. 2 is a view similarto Fig. 1, the alternate markers being raised out of operative position.Fig. 3 is a view showing the opposite side from Fig. 1, disclosing theset screws. Fig. 4- is a vertical section taken on the line 4-4 of Fig.1, through one of the marking rods. Fig. 5 is a longitudinal sectiontaken on line 5-5 of Fig. 1 through the central pivot and binding clamp.

Referring now more particularly to the drawings, the present inventioncomprises a plurality of diagonal plates 5, arranged in a parallelseries as shown, and also plurality of similar plates 6, arrangedoppositely in parallel relation, and pivoted at their ends to the endsof the plates 5. The plates 5 and 6 thus cross at their centers, atwhich points they are pivoted as shown at 7, the pivot Specification ofLetters Patent.

Application filed August 13, 1908.

Patented July 6, 1909.

Serial No. 448,382.

points at the ends of the plates being indicated at 8. At the ends 01the instrument there are short plates 9, extending outwardly to ameeting pivot 10. There is thus formed a lazy tong oi the usual type.The pivot ing of the ends of the plates 5 and 6 is accomplished throughthe medium of blocks 12, having stems 13, passed through aliningportions 14 formed in the ends of the plates 5 and 6. The blocks 12 havevertical passages 15 formed therethrough, and communicating with thesepassages 15, there are horizontal passages 16, opening through the outerfaces of the blocks, and receiving set screws 17. The blocks 12 are thusarranged in vertically alining pairs, and the passages 15 of the alinedblocks registered for the reception of vertically extending marking rods18, which are slidably engaged in the passages for vertical movement.The set screws 17 are operable to impinge against the rods 18, thusholding the latter against movement. The lower ends of the rods 18 aresharpened at 18, to form marking points. The extremities 14 of the stems13, opposite to the blocks 12, are provided with transverse passages 14,for the reception of cotter pins 19, which hold the stems with theblocks in position. It will thus be observed that certain of the markingrods may be raised out of the plane of the lower ends of the remainingrods, to vary the marking, and when it is desired to produce anunusually long instrument, the plates 9 are removed, and the ends 01'the outermost plates 5 and 6 of two instruments are pivoted together.

Certain of the pivots 7, are :lormed by screws 20, passed throughopenings at the points of crossing of certain of the plates 5 and 6,these screws having thumb nuts engaged therewith and operable to clampthe cross plates together to prevent movement of the several plates withrespect to each other.

It will of course be understood that movement of the lazy tong structurelongitrulinally will vary the distance between the marking points 18.

What is claimed is:

In a marking instrument of the class described, the combination with aplurality of plates disposed in diagonal parallel relation, 01 a secondseries of plates disposed diagonally in parallel relation to each otherand in cross relation to the first named plates the ends of the platesof the two series being dishas posed in overlapped relation, and thecorrepassages, and set screws engaged in the ensponding plates of thetwo series crossing at larged heads of the pivot devices for operatheircenters, pivot devices engaged in the tion to impinge the marking rodsto hold centers of the crossed plates, pivot devices said rods againstvertical movement.

5 engaged in the overlapped ends of the crossed In testimony whereof Iaffix my signature,

plates, said second named pivot devices havin presence of two Witnesses.ing enlarged heads at one end, the heads 01' JOHN M. CAMPBELL. thevertically alining pivot devices having Vitnesses: registering passagesformed therethrough, EDNA MOIVER,

10 marking rods slidably engaged in the alining ROBERT L. WALLACE.

